then what motor will pull #300 pounds of battery plus trailer, bicycle/trike/quad and still be able to do 20mph on less then a 1000 watt motor
unless you have solar panels to recharge from your still burning fossil fuels and even if you do how did the solar panels and every thing else get delivered?
50% of the electric produced in the usa is from coal. Now do a search on coalash spills.
Nothing is perfect but walking jogging running or swimming. In some parts of the world all electricity comes from diesel burning generators.
I don't know of anything that will pull that much weight around. At least not an electric one. I just said there are other alternatives to lead acid. I had mentioned Nimh batteries. I personally have had great luck with them. No complicated and expensive battery management systems either. I also am lucky enough to have a dedicated battery store near to where i live that can get me almost anything i want. I may have to get creative with mounting, but at least i have choices.
I don't consider solar panels to be of much use to anyone other than as a novelty item. Unless they have improved an awful lot over the past few years. They simply will not do a good enough job of producing power for their cost. Windmills do a much better job of producing electricity than solar panels. The sun doesn't always shine and the wind doesn't always blow.
I don't have my head in the sand about how electricity is produced either. The only thing that remotely comes close to being environmentally friendly are hydro electric dams. That is a very good method, but not every part of the world has a Niagra Falls or equivalent.
I am simply trying to suggest other methods than what people seem to think are the only available options.